合并两个图像转换成一个图像iPhone

我需要两个图像合并成一个图像，这里是我的代码：合并两个图像转换成一个图像iPhone

-(UIImage*)mergeImage:(UIImage*)mask overImage:(UIImage*)source inSize:(CGSize)size 
{ 
    //Capture image context ref 

    UIImageView *totalimage=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)]; 

    UIImageView *firstImage=[[UIImageView alloc] initWithImage:mask]; 
    UIImageView *secondImage=[[UIImageView alloc] initWithImage:source]; 

    [totalimage addSubview:firstImage]; 
    [totalimage addSubview:secondImage]; 

    UIGraphicsBeginImageContext(totalimage.bounds.size); 
    [totalimage.layer renderInContext:UIGraphicsGetCurrentContext()]; 
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 

    //Draw images onto the context 
    [source drawInRect:CGRectMake(0, 0, source.size.width, source.size.height)]; 
    [mask drawInRect:CGRectMake(0, 0, mask.size.width, mask.size.height)]; 

    return viewImage; 

}

我把这种方法如下：

UIImage *totalImage = [self mergeImage:self.Apicimage overImage:questionImage inSize:CGSizeMake(100, 100)];

但在执行我得到这个输出：

Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextSaveGState: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextSetBlendMode: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextSetAlpha: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextTranslateCTM: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextScaleCTM: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextConcatCTM: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextDrawImage: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextRestoreGState: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextSaveGState: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextSetBlendMode: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextSetAlpha: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextTranslateCTM: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextScaleCTM: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextConcatCTM: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextDrawImage: invalid context 0x0 
Jun 15 16:11:06 iPad-2 VueGuides[9195] <Error>: CGContextRestoreGState: invalid context 0x0

任何人都可以指导我。我怎样才能合并两个图像？

来源

2012-06-14 Chithri Ajay

写，你实际上并没有使用你通过你的'CGSize'参数。 – Nate

代码

[source drawInRect:CGRectMake(0, 0, source.size.width, source.size.height)]; 
    [mask drawInRect:CGRectMake(0, 0, mask.size.width, mask.size.height)];

前应

UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext();

除了ArunGJ的答案，这是正确的

来源

2012-06-14 10:56:41 ArunGJ

合并两个图像转换成一个图像iPhone

回答

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